101011112221 has 4 divisors (see below), whose sum is σ = 101012524732. Its totient is φ = 101009699712.

The previous prime is 101011112161. The next prime is 101011112239. The reversal of 101011112221 is 122211110101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122211110101 = 263 ⋅464681027.

It can be written as a sum of positive squares in 2 ways, for example, as 43990448121 + 57020664100 = 209739^2 + 238790^2 .

It is a cyclic number.

It is not a de Polignac number, because 101011112221 - 2⁷ = 101011112093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101011115221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592926 + ... + 744031.

It is an arithmetic number, because the mean of its divisors is an integer number (25253131183).

Almost surely, 2^101011112221 is an apocalyptic number.

It is an amenable number.

101011112221 is a deficient number, since it is larger than the sum of its proper divisors (1412511).

101011112221 is an equidigital number, since it uses as much as digits as its factorization.

101011112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412510.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101011112221 its reverse (122211110101), we get a palindrome (223222222322).

The spelling of 101011112221 in words is "one hundred one billion, eleven million, one hundred twelve thousand, two hundred twenty-one".